SMOKE DETECTORS FOR HOME: The SW1-R mains powered optical smoke alarm has a 9V backup battery for protection during outages. It detects slow-burning fires, making it ideal for living spaces. For full coverage, consider FireAngel Thermoptek Alarms. ENHANCED SENSING: The high performance optical smoke sensor ‘sees’ white smoke as it enters the alarm, providing a fast response to slow, smouldering fires while being less prone to false alarms. LINKED SMOKE ALARMS: The SW1-R functions as a standalone unit or can be wired with up to 12 other mains powered smoke (SW1), heat (HW1), or carbon monoxide (CW1) alarms. All alarms sound simultaneously if one is triggered. SAFETY ASSURED: The SW1-R mains smoke alarm meets British Safety Standard EN 14604: 2005 and is designed for domestic use. It comes with a 5 year warranty. SLEEP EASY: The Sleep Easy function allows you to silence low battery chirps for up to 8 hours, ensuring an uninterrupted night’s sleep while still keeping your home protected.